Warp stop mechanism for looms



nmaqzw Won Filed Nov. 23

B D L ELLISON WARP STOP MECHANISM FOR LOOMS Den 18,1923.

ATTORNEY Patented Deco l i922.

:13 D LENHART LEILI JTSOIII' F ATLANTA, GEORGIA, ASSIGNOR TO DRAPER CORPORA- TION, 0F HOPEDALE, MASSJACHUSETTS, A COEEORATION OF ILEAINE.

WARP STOP MECHANISEE FOR LOOMS.

Application filed November 23, 1922.

To all whom it may concern:

Be it known that l, B D LENHART ELLI- SON, a citizen of the United States, residing at Atlanta, in the county of Fulton and State of Georgia, have invented an Improvement in Warp Stop Mechanisms for Looms,

brought to rest when the warp thread breaks or becomes too slack for weaving purposes.

One of the objects of the present invention is to provide a train of mechanism between the main parts of the warp stop mo tion and the shipper which may be rendered effective without lost motion between the parts to stop the loom when a warp thread breaks or becomes too slack, and is more particularly directed to improvements on the construction shown and described in the Ambler Patent No. 885,130, April 21, 1908.

In accordance with the present invention, as will more fully appear, the dog for engaging the bunter on the lay and thus effecting loom stoppage shall be operated posi tively without lost motion between the parts as distinguished from the construction disclosed in the Ambler patent.

In the drawings:

Fig. 1 is a fore and aft sectional view of a loom having the present invention embodied therein.

Fig. 2 is an enlarged detailed perspective of the dog and its controlling means.

The invention is herein shown as asso ciated with the warp stop motion of the type shown and described in the patent to Edward S. Stimpson, No. 1,409,425, March 1922, and while its advantages are more particularly apparent in connection with such type of warp stop motion, in certain aspects the invention may be employed in connection with other forms of warp stop mechanisms.

The loom frame 1 of usual construction has pivotally mounted thereon at 2 the shipper 3, and associated with the shipper is the knock-off which as shown consists of a lever l, pivoted at 5 to the loom frame.

The warp stop motion proper consists of the drop wires 6, the feeler carrier 7 and feelers 8. The feeler carrier and feelers are Serial No. 602,751.

mounted for sliding or reciprocating movement by means of an actuator 9 connected by a rod 10 with a follower 11 which normally bears upon the cam 12. These parts may be the same as more fully shown and described in the patent to Stimpson above mentioned and need no further description.

The lay 13 has mounted thereon the hunter 14 and, as usual, the lay is given its beatup movements from the crank shaft 15.

Secured to the loom frame at one side thereof is the bracket 16 having the extension 17 to which is pivotally connected at 18 the dog carrier 19.

Between the carrier 19 and the knock-off lever tie the connection 20 which in the present instance is pivotally secured to the carrier 19 at 21. The carrier 19 is bifurcated as at 22 and in the bifurcation of the carrier is pivotally mounted the dog 23, the active end at of which is notched for engagement by the hunter. As shown the dog 23 and the link 20 are mounted upon the same pivot stud 21 supported by the dog carrier 19.

The dog 23 has an arm 25 extending therefrom and, as shown, it is cast with or formed as part of the dog 23, so that it is rigid therewith.

In accordance with the present invention the projecting arm 25 serves as a means for directly connecting the dog with the feeler actuator. The connection between the arm or projection 25 and the feeler actuator consists of a link 26 directly pivoted at 27 to the arm 25 without lost motion. The other end portion of the link 26 is connected tothe feeler actuator, such connection as shown consists of the radius arm 27"" secured to the rock shaft 9.

When the warp threads are in normal. weaving condition and support the drop wires, the actuator for the feeler operating through the radius arm 27* and the link 26 serve to move the dog out of the path of the hunter 14 as. the lay goes back. When however the feeler is arrested in its detecting movement by one of the drop wires as indicated in Fig. 1, the dog 23 will not be moved out of the path of the bunter and consequently on backward movement of the lay the hunter will strike the dog and move the carrier 19 about its pivotal support 18- apfd effect loom stoppage through the knoclo The association and relation of thepivotal' patent, and owing to the direct connection between the link 26 and the arm 25 of the 1. In a warp stop mechanism for looms,

the combination of a shipper, a knock ofl lever therefor, a bracket secured to the loom frame, a swinging carrier mounted on the bracket, a dog pivotally mounted on the carrier "and a link connecting the carrier and knock-0E lever, the lay, a hunter thereon to cooperate. with the dog on the back stroke of the lay and swing the carrier .a series of drop wires normally supported by the warp threads vduring weaving, a sliding feeler adapted to be arrested in its sliding movement in one direction by a released drop wire, an arm projecting upwardly from the dog and rigidly secured thereto for movement with the carrier and dog, an actuator for sliding the teeler in its detecting movements, and a link moved by the actuator and directly connected to the arm projecting upwardly from the dog constructed and arranged to. permit knock-01f movement of the dog Without lost motion between-the parts.

2. In a warp stop mechanism for looms, the combination of the lay havinga bunter, a shipper, releasing means for the shipper comprising a dog to cooperate with the bunter, a dog carrier pivotally supported, an arm rigid with the dog and extending upwardly therefrom, a feeler, an actuator for imparting sliding movements to the teeler, a series; of drop wires normally supported by the warp threads during weaving, and. link connected to the actuator and pivoted directly to the arm on the dog for controlling the dog without lost motion be;- tween the parts when the dog is struck by the hunter and the carrier and dog are moved about the pivotal support of the carrier.

3. In a warp stop mechanism for looms,

the combination ofa series of drop wires normally supported by the warp threads during weaving, a feeler adapted to be arrested by a drop wire when the latter is in abnormal position, an actuator for the feeler, a shipper, a k-nocleo ll for the'shipper, a bracket secured to the loom frame, a carrier pivotally supported on the bracket and connected to the shipper knockoff, a dog pivotally mounted on the carrier and having a rigid arm extending to one side of the horizontal plane passed through the pivot of the dog, and a rod directly pivoted to the rigid arm and connected to the actuator for the teeler to permit the carrierand dog to effect knock-011i movement for the shipper and prevent lost motion between the par-ts when the carrier and dog are moved about the pivotal support oi the carrier. 7

i. In a warp stop mechanism for looms, the combination of a bracket secured to-the loom frame, a dog carrierpivotally supported on the bracket, a dog pivotally mounted on the dog carrier and having a rigid arm extending upwardly therefrom and which is movable with the dog has the latter moves with the dog carrier and about its pivotal connection therewith, a feeler, a radius arm connected with the feeler and also pivoted at a fixed point to the rigid arm extended from the dog, the'lay, a hunter on the lay for engaging the dog to effect loom stoppage when thefeeler is arrested in its detecting movement.

In testimony whereof, I have signed my name to this specification.

B D-LENHAR-T ELLISON. 

